WO2004101408A2 - Guiding device for a continuous sheet - Google Patents
Guiding device for a continuous sheet Download PDFInfo
- Publication number
- WO2004101408A2 WO2004101408A2 PCT/EP2004/050734 EP2004050734W WO2004101408A2 WO 2004101408 A2 WO2004101408 A2 WO 2004101408A2 EP 2004050734 W EP2004050734 W EP 2004050734W WO 2004101408 A2 WO2004101408 A2 WO 2004101408A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- guiding device
- guide element
- web guiding
- air
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 70
- 239000011148 porous material Substances 0.000 claims abstract description 47
- 239000011087 paperboard Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims description 20
- 239000011111 cardboard Substances 0.000 claims description 6
- 230000003670 easy-to-clean Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 abstract description 3
- 239000000109 continuous material Substances 0.000 abstract 1
- 206010040954 Skin wrinkling Diseases 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/32—Arrangements for turning or reversing webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/10—Means using fluid made only for exhausting gaseous medium
- B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
- B65H2406/113—Details of the part distributing the air cushion
- B65H2406/1131—Porous material
Definitions
- the invention relates to a web guiding device with at least one guiding element, which is arranged after an application unit and serves as an air turn, for contactless web guiding in a machine used to manufacture and / or treat a material web, in particular paper or cardboard web. It also relates to a machine for producing and / or treating a material web, in particular
- Paper or cardboard web with at least one such web guiding device.
- a so-called airturn mostly has slot nozzles with a mutual slot nozzle spacing of about 20 to about 200 mm and a respective slot width that is greater than 1 mm. If rows of perforated nozzles are provided, the diameter of the perforated nozzle is generally greater than 2 mm.
- the web distance to the surface is usually greater than 5 mm, whereby it is usually in a range from 7 to 20 mm.
- the specific volume flow is usually in a range from 1000 to 30000 Nm 3 / h • m 2 .
- the invention has for its object to provide an improved web guiding device of the type mentioned, in which the aforementioned disadvantages are eliminated.
- a stable wrinkle-free and reliable, non-contact web guidance is to be achieved.
- the guide element has a guide surface which consists at least partially of air-permeable porous material which can be acted upon with compressed air in order to form an air cushion between the guide surface and the moving material web via the air flowing through this porous material.
- the high pressure loss on the porous material creates a very uniform air cushion, so that the material web is reliably guided at a relatively small distance from the surface. This results in a wrinkle-free run in particular.
- the relatively high internal pressure prevents any contact with the surface.
- the web guiding device can thus in particular comprise at least one guide element which is supplied with compressed air and has an open surface, but with a high pressure loss, through which air is pushed through from the inside. This creates a stable, even air cushion, both in terms of time and space, which guides the web without contact with the guide element.
- the guide element preferably comprises at least one pressure chamber, via which compressed air can be applied to the porous material.
- the porous material can be at least partially applied to a carrier containing the pressure chamber and provided with air passage openings.
- embodiments are also conceivable, for example, in which the porous material forms at least part of the pressure chamber wall.
- the pressure in the pressure chamber can in particular be greater than 0.5 bar, it preferably being greater than 1 bar.
- the specific volume flow in the porous material is expediently in a range from about 10 to about 5000 Nm 3 / h • m 2 .
- the hole or pore spacing or the distance between the outlet openings of the air-permeable porous material is preferably less than 1 mm.
- the porous material is especially designed in such a way that no individual jets are generated, but instead a very even air cushion, which ensures very good web guidance, which in any case remains contact-free, especially in the case of holes, tears or ribbons.
- the average size of the outlet openings, pores and / or holes of the porous material is less than 0.2 mm and preferably less than 0.1 mm.
- the porous material is preferably selected such that there is a high pressure loss from the inside to the surroundings, as a result of which a very uniform air cushion is generated.
- the Pressure loss in particular from the side facing away from the moving material web to the side of the porous material facing the material web, is greater than 0.2 bar and preferably greater than 0.8 bar.
- the thickness of the air cushion formed between the guide surface and the moving material web and thus the web distance to the surface is advantageously less than 5 mm and preferably less than 3 mm.
- the guide element can in particular be designed as a roller. This can be designed as a stationary or non-rotating roller or as a rotating, preferably driven roller.
- the air cushion is advantageously generated only on part of the circumference of the roller.
- the roller can have a diameter in a range from about 50 mm to about 1500 mm, for example.
- the guide element is only wrapped in the material web.
- the guide element is wrapped not only by the material web but also by at least one moving belt, in particular a wire belt.
- the moving belt in particular screen belt, can be guided between the guide element and the material web or on the side of the material web facing away from the guide element, ie it can lie on the outside.
- the material web or the moving belt can, for example, wrap around the guide element in accordance with a wrap angle whose range is from about 5 to about 260 °.
- the guide element is designed as an arc segment. It can have a constant radius of curvature in the machine direction or a radius of curvature that changes in the machine direction. In the latter case, the guide element can have a radius of curvature that changes continuously in the machine direction or a radius of curvature that changes in discrete steps in the machine direction.
- the guide element or its guide surface can in particular also have a course curved in the transverse direction.
- the radius of curvature of the guide element or the guide surface can change over the width extending in the transverse direction.
- the guide element is designed as an arc segment, it expediently has a segment height in a range from approximately 30 to approximately 500 mm.
- the radius of curvature of the guide surface is expediently in a range from approximately 5 to approximately 3000 mm.
- the guide element is composed of several individual segments in the transverse direction and / or in the machine direction.
- a common compressed air supply can be assigned to at least some of the segments.
- the segments can also be supplied at least partially via separate compressed air supplies.
- a zoned separation of compressed air is provided over individual separate segments and / or segment groups in the machine running direction and / or in the transverse direction.
- a special zone-wise pressure gradation can thus take place in the machine running direction or transverse direction.
- the guiding surface of the guiding element is formed by at least two layers each consisting at least partially of air-permeable porous material with preferably different properties.
- the pressure loss on the inner layer facing away from the material web can be smaller than on the outer layer.
- the porosity of the inner layer facing away from the material web can be higher or its hole spacing can be greater than in the outer layer.
- the hole diameter on the inner layer facing away from the material web can be larger than on the outer layer. It is also particularly advantageous if the layers consist at least partially of different material.
- Another preferred embodiment of the web guiding device according to the invention is characterized in that the material Inner layer facing away from the radial path consists only in a partial area of air-permeable porous material or is provided with air passage openings and is otherwise air-impermeable, so that an air cushion is generated only in a partial area of the guide element.
- the inner layer facing away from the material web can at least partially consist in particular of metal, GRP and / or CFRP.
- the inner layer facing away from the material web preferably provides the mechanical load-bearing capacity of the guide element or the guide surface.
- the outermost surface of the guide element facing the material web can in particular consist of fine-porous material. In particular, it can have a finer degree of porosity than the inner layer.
- this outermost surface of the guide element facing the material web can also consist of ceramic material, for example.
- the outermost surface of the guide element facing the material web is easy to clean, that is to say, for example, consists of an easy-to-clean material.
- the guide surface of the guide element is provided with air outlet openings which are preferably produced directly when the outermost surface is produced.
- the relevant air outlet openings therefore do not have to be introduced into the outermost surface by subsequent processing.
- the web guiding device according to the invention can be used in particular in a machine for producing and / or treating a material web, in particular paper or cardboard web.
- the surface treatment application unit is provided as a replacement for an air turn at least one corresponding web guiding device. Thanks to the small web distance and the even air cushion, wrinkle-free guidance is also ensured here. Further advantages result from the lower air volume and the smaller construction volume.
- the guide element can, for example, only be wrapped in the material web or, in addition to the material web, for example, can also be wrapped in at least one screen belt.
- At least one corresponding web guiding device is provided as a replacement for a respective spreader roller.
- the guide element in question is provided as a rotatably mounted roller, good emergency running properties also result, since even if the pressure supply fails, there can be no friction between the material web or a moving belt, for example a sieve belt and the rotating roller.
- the pressure loss of the layers can increase from the inside to the outside.
- the porosity can decrease from the inside out.
- the hole spacing can decrease from the inside to the outside.
- the hole diameter can also decrease from the inside to the outside.
- At least one web guiding device In order to be able to guide the material web safely and wrinkle-free, it is advantageous to arrange at least one web guiding device immediately before, preferably also immediately after a contactless drying section.
- the contactless drying sections are generally designed as infrared and / or convection dryers. Contactless drying is particularly necessary for coated or very moist material webs.
- the guide elements of the web guide cleaning form only a relatively thin air cushion with the material web, which minimizes the risk of wrinkles. In addition, the guide elements require relatively little compressed air.
- Contactless drying devices can also be assigned to the guide elements of the web guiding device in order to intensify the drying of the material web. These drying devices are located opposite the guide elements.
- FIG. 1 shows a schematic cross-sectional illustration of a guide element serving for contactless web guidance with a guide surface consisting at least partially of porous material
- FIG. 2 shows a schematic cross-sectional illustration of a further embodiment of the guide element, which is designed, for example, in the form of an arc segment,
- FIG. 3 shows a schematic longitudinal sectional illustration of a further embodiment of the guide element, which is divided into at least two zones or segments in the transverse direction, in which case the different segments are subjected to the same pressure,
- Figure 4 is a comparable with the embodiment of Figure 3
- FIG. 5 shows a schematic illustration of a guide element which is bent in the transverse direction and can be used, for example, for wide stretching,
- FIG. 6 shows a schematic illustration of a preferred embodiment, in which a guide element is provided after an application unit as a replacement for an air turn
- FIG. 7 shows a schematic illustration of a contactless dry section with guide element.
- FIG. 1 shows a schematic representation of a first embodiment of a guiding element 10 of a web guiding device which serves for the contactless web guiding and which can be used in particular in a machine serving for the production and / or treatment of a material web, in particular paper or cardboard web.
- a guide element 10 e.g. to be described again in more detail below, in particular to be provided as a replacement for an air turn after an application unit 34 (cf. in particular FIG. 6).
- the guide element 10 in the present case in the form of a roller, for example, has a guide surface 12 which consists of air-permeable porous material 14 which can be acted upon from the inside with compressed air in order to move over the air 16 flowing through the porous material 14 and the moving air Material web to form an air cushion 18.
- the guide element 10 comprises at least one pressure chamber 20, via which the porous material 14 can be pressurized with compressed air.
- the guide element 10 can comprise, for example, a support 24 containing the pressure chamber 20 and provided with at least one and preferably a plurality of air passage openings 22, on which the porous material 14 is applied.
- this, for example, roller-shaped carrier 24 is completely surrounded by porous material 14 in the circumferential direction.
- the wall of the pressure chamber 20 is only provided with air passage openings 22 over part of its circumference, so that the air cushion 18 is only produced over part of the circumference of the guide element 10.
- the air cushion is expediently 18 generated at least in the area in which the material web wraps around the guide element 10.
- the guide element 10 has a radius of curvature, in particular in the region around the machine in the machine running direction L.
- FIG. 2 shows a diagrammatic cross-sectional illustration of a further embodiment of the guide element 10, which is embodied here, for example, in the form of an arc segment.
- Compressed air is again applied to the segment in question via a pressure chamber 20, so that air 16 flows through the porous material 14 from the inside to the outside.
- the porous material 14 is again applied externally to a carrier 24 containing the pressure chamber 20.
- the wall of the carrier 24 or the pressure chamber 20 is again provided with air passage openings 22, through which the porous material 14 is pressurized from the inside with compressed air.
- the guide element 10 or its guide surface 12 is again curved in the machine running direction L in the present case.
- the radius of curvature is constant, for example, over the wrapping area.
- FIG. 3 shows a further embodiment of the guide element 10 in a schematic longitudinal sectional view.
- the guide element 10 or its pressure chamber is divided in the transverse direction into at least two zones or segments 20 ′, 20 ′′, via which the porous material 14 may be separated in the transverse direction Compressed air can be applied to it.
- the zones 20 ', 20 "are at least temporarily with applied the same pressure.
- FIG. 4 shows the same guide element 10 in a phase in which the zones or segments 20 ′, 20 ′′ are currently being subjected to different pressures.
- the pressure can therefore be adjusted across the width, i.e. can be varied in the transverse direction in the desired manner.
- the guide element 10 can at least essentially again have such a structure, as has been described in connection with the other embodiments. Corresponding parts are assigned the same reference numerals.
- FIG. 5 shows a schematic illustration of a guide element 10 which is bent in the transverse direction and can be used, for example, for spreading.
- the guide element again has a carrier 24, which has at least one pressure chamber 20, on which the porous material 14 is attached and, via the pressure chamber 20, the porous material 14 from the inside Comes with compressed air.
- the effective deflection radius can be changed, for example.
- this embodiment can at least essentially have the same structure as the previously described embodiments. Corresponding parts are assigned the same reference numerals.
- the porous material 14 is in each case attached to a carrier 24 provided with air passage openings 22, at least a part can in principle also be used a support wall or at least part of the wall of the pressure chamber 20 can be formed by the porous material 14.
- FIG. 6 there is a guide element 10 1 after the dryer section 32 and in front of an application unit 34, a guide element 10 2 as a replacement for an air turn between the application unit 34 and, for example, an impingement dryer 36 and a guide element 10 3 after the Impingement dryer 36 arranged.
- the guide elements 10 can, in particular, be designed again as described above, for example, with reference to FIGS. 1 to 5.
- At least one guide element 10 can also be provided in a coating machine, before a reel-up and / or after an uncoiler.
- the material web 28 runs through a contactless drying section 38 in which the material web 28 is blown with hot air on both sides.
- the material web 28 is additionally opposite the guide elements 10 blow the arranged drying devices 37 with hot air.
- Guiding element guiding surface, porous material, air flowing through Air cushion, pressure chamber, air passage opening, support, press, press section, material web, drying cylinder, drying section, application unit, impingement dryer, drying device, contactless drying section
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006530177A JP2007501758A (en) | 2003-05-19 | 2004-05-07 | Web guide device |
DE502004003888T DE502004003888D1 (en) | 2003-05-19 | 2004-05-07 | GUIDING DEVICE |
US10/557,369 US20080010852A1 (en) | 2003-05-19 | 2004-05-07 | Guiding Device For A Continuous Sheet |
EP04741528A EP1626920B1 (en) | 2003-05-19 | 2004-05-07 | Guiding device for a continuous sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10322519.6 | 2003-05-19 | ||
DE10322519A DE10322519A1 (en) | 2003-05-19 | 2003-05-19 | Web guiding means |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004101408A2 true WO2004101408A2 (en) | 2004-11-25 |
WO2004101408A3 WO2004101408A3 (en) | 2005-03-17 |
Family
ID=33440973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/050734 WO2004101408A2 (en) | 2003-05-19 | 2004-05-07 | Guiding device for a continuous sheet |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080010852A1 (en) |
EP (1) | EP1626920B1 (en) |
JP (1) | JP2007501758A (en) |
CN (1) | CN100522774C (en) |
AT (1) | ATE362890T1 (en) |
DE (2) | DE10322519A1 (en) |
WO (1) | WO2004101408A2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005017789A1 (en) * | 2005-04-14 | 2006-10-19 | Voith Patent Gmbh | web guide element |
DE102005017792A1 (en) * | 2005-04-14 | 2006-10-19 | Voith Patent Gmbh | web guide element |
DE102005017790A1 (en) * | 2005-04-14 | 2006-10-19 | Voith Patent Gmbh | web guide element |
DE102007055864A1 (en) | 2007-12-19 | 2009-06-25 | Voith Patent Gmbh | Conveyor belt and method for its production |
DE102009026059B4 (en) * | 2009-06-29 | 2024-02-01 | Krones Aktiengesellschaft | Device for spreading a film web |
EP2299473A1 (en) * | 2009-09-22 | 2011-03-23 | Applied Materials, Inc. | Modular substrate processing system and method |
US8397539B2 (en) | 2010-02-18 | 2013-03-19 | Corning Incorporated | Non-contact dancer mechanisms, web isolation apparatuses and methods for using the same |
US10159551B2 (en) * | 2013-12-20 | 2018-12-25 | Kimberly-Clark Worldwide, Inc. | Vaginal insert method of manufacture |
EP3129313B1 (en) * | 2014-04-09 | 2018-05-16 | Syncro S.r.l. | Device for removing a coreless roll from a spindle |
DE102015205984A1 (en) * | 2015-04-02 | 2016-10-06 | Krones Aktiengesellschaft | Method and guide system for the transport of containers or container components in industrial plants for container production and / or product filling |
CN105252907A (en) * | 2015-12-01 | 2016-01-20 | 重庆宏声印务有限责任公司 | Alumite leapfrog driving traction roller of gilding press |
JP7265553B2 (en) | 2017-10-30 | 2023-04-26 | コーニング インコーポレイテッド | Thin glass ribbon processing system and method |
JP6527981B1 (en) * | 2018-03-27 | 2019-06-12 | 株式会社タンケンシールセーコウ | Turn bar |
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2003
- 2003-05-19 DE DE10322519A patent/DE10322519A1/en not_active Withdrawn
-
2004
- 2004-05-07 CN CNB2004800136379A patent/CN100522774C/en not_active Expired - Fee Related
- 2004-05-07 DE DE502004003888T patent/DE502004003888D1/en active Active
- 2004-05-07 WO PCT/EP2004/050734 patent/WO2004101408A2/en active IP Right Grant
- 2004-05-07 US US10/557,369 patent/US20080010852A1/en not_active Abandoned
- 2004-05-07 EP EP04741528A patent/EP1626920B1/en active Active
- 2004-05-07 JP JP2006530177A patent/JP2007501758A/en active Pending
- 2004-05-07 AT AT04741528T patent/ATE362890T1/en not_active IP Right Cessation
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Title |
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PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 01, 29. Januar 1999 (1999-01-29) & JP 10 279147 A (SONY CORP), 20. Oktober 1998 (1998-10-20) * |
Also Published As
Publication number | Publication date |
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CN1791542A (en) | 2006-06-21 |
EP1626920A2 (en) | 2006-02-22 |
DE10322519A1 (en) | 2004-12-09 |
US20080010852A1 (en) | 2008-01-17 |
EP1626920B1 (en) | 2007-05-23 |
WO2004101408A3 (en) | 2005-03-17 |
DE502004003888D1 (en) | 2007-07-05 |
ATE362890T1 (en) | 2007-06-15 |
JP2007501758A (en) | 2007-02-01 |
CN100522774C (en) | 2009-08-05 |
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